I 2nd the Motion!!!
Forget the 24AWG UTP Cable idea (the CAT-5e), and get some rolls of 18/4 or 16/4 Cable instead!
Much easier to Terminate with the "Standard" type 4C Cable, as opposed to messing with the tight twists per pair, plus stripping the tiny Conductors of CAT-5e UTP.
You could use the "Basic" type Cable (no shielding, no "frills", untinned, for "All Uses"), or you can get the "Audio Quality", or "Architectural Speaker Cable".
I think Carol Cable
sells a 1,000 ft roll of 18/4 "Architectural Speaker Cable" with CMR/CL3R rating, for something like $100.00 - close to the price of a box of CAT-5e.
Make sure to get Cable with the proper Jacket + Insulation needed - like "Riser" or "General Purpose" for Non-Rated areas (or in Conduits), or "Plenum Rated" for Plenum Rated Ceilings/Spaces.
If you do end up using the UTP, run "+" and "-" across each twisted pair, then join ends per Polarity at Terminations.
[*] Pair #1: Blue on White = "+", White on Blue = "-";
[*] Pair #2: Orange on White = "+", White on Orange = "-";
[*] Pair #3: Green on White = "+", White on Green = "-";
[*] And Pair #4 would be the "Voice" pair.
BTW, what is the reason for using the UTP Cable on this task? Is there some specification, preference, or any other reason for its use?