Congratulations for your foray into the wonderful world of cables! 

  My routine is mostly free weight based, but I do use some cables for isolation moves.  And on occasion to switch things up a little.  Here's my routine, & I'll insert some subs w/cables if you want to give it a try.  Have fun!
 
Legs:
Squats on smith machine, 3 sets 8-10
Lunges on smith machine, "
Leg press, 3 sets 6-8
Leg extensions, 3 sets 6-10
Ham curls, 3 sets 6-10 (I use a standing ham curl machine w/cables working each leg in isolation, there are also some that plate load, if you have one at your gym give it a shot, it's SO much better than the ham machines that work both sides at the same time)
 
Chest:
Bench press, 3 sets 8-10
Incline press, 3 sets 8-10
Low end cable flies, 3 sets 8-10 (you want to place the handles at the lowest setting on the machine)
Pec deck, 3 sets 8-10
 
Biceps:
Barbell curls, 3 sets 6-8
21s on cable machine--you've seen these in Cathe's DVDs, similar to crazy 8s.  You divide the range into 3, do 7 reps at the low end, 7 reps at the mid end, 7 reps at the high end.
Preachers curls, 3 sets 6-8
Concentration curls, 3 sets 8
 
Back:
Assisted pullups, 3 sets 6-8
Wide grip lat pulldowns, 3 sets 8-10
Close grip lat pulldowns, 3 sets 8-10
Seated rows, 3 sets 8-10
Back extensions, 3 sets 15
 
Triceps:
Cable pushdowns w/V bar, 3 sets 8-10 (can sub with overhead extensions with rope)
Modular cable tricep extensions, 3 sets 8-10 (this is a super cool machine if your gym has it, very effective)
One armed cable pulldowns, 3 sets 8-10
Overhead extensions, 3 sets 8-10
 
Shoulders:
Barbell shrugs, 3 sets 10 (I never do my max on these, I'm afraid of the football player neck)
Upright barbell rows, 3 sets 10 (can be subbed on cable machine with straight bar at lowest setting)
Military press, 3 sets 6-8
Front raises, 3 sets 8-10 (can be subbed on cable machine with straight bar at lowest setting--not quite as challenging but nice if you're short on time b/c you're not working both sides separately)
Lateral raises, 3 sets 8-10 (can be subbed on cable machine with handle at lowest setting)
Bentover lateral raises for rear delts, 3 sets 8-10 (can be subbed on cables with handle at lowest setting)
Side lying lateral raises, 3 sets 10
 
I think that's everything (other than core & cardio, I'm sure you don't need my help for that 

).  Let me know if anything's unclear.  BTW, I started this sort of nontraditional split b/c I used to work shoulders w/legs, but both being my most important body parts, I was too tired after legs to get a decent delt w/o, so I took my easiest routine (chest), paired it w/legs, & took my second easiest routine (tris) & paired them w/shoulders.