One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,7)(9,10)(11,14)(12,16)(13,15)(17,18,23,28)(19,22,27,24)(20,25,30,32)(21,29,31,26)(1,3,5,4)(2,6,7,8)(9,11,14,10)(12,16,13,15)(17,19,23,27)(18,24,28,22)(20,21,30,31)(25,26,32,29)(1,4,5,3)(2,6,7,8)(9,12,14,13)(10,15,11,16)(17,20,21,27,23,30,31,19)(18,25,29,24,28,32,26,22)(9,12,14,13)(10,15,11,16)(17,21,23,31)(18,26,28,29)(19,30,27,20)(22,25,24,32)(9,13,14,12)(10,15,11,16)(17,22,31,32,23,24,21,25)(18,27,26,20,28,19,29,30)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.