One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(9,10)(11,13)(12,14)(15,16)(17,18,23,24)(19,25,21,26)(20,30,27,22)(28,31,32,29)(1,3,5,4)(2,6,7,8)(9,11,12,15)(10,13,14,16)(17,19,23,21)(18,25,24,26)(20,31,27,29)(22,28,30,32)(10,14)(13,16)(17,20,23,27)(18,22,24,30)(19,28,21,32)(25,29,26,31)(1,4,5,3)(2,6,7,8)(17,21,23,19)(18,26,24,25)(20,31,27,29)(22,28,30,32)(17,22,23,30)(18,27,24,20)(19,29,21,31)(25,32,26,28)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.