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