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