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)(11,14)(12,15)(13,16)(17,18,21,22)(19,23,27,26)(20,28,30,24)(25,29,32,31)(9,11,14,10)(12,15,13,16)(17,19)(18,23)(20,29)(21,27)(22,26)(24,25)(28,32)(30,31)(2,5)(6,8)(9,12,14,13)(10,15,11,16)(17,20)(18,24)(19,25)(21,30)(22,28)(23,31)(26,29)(27,32)(1,3,4,7)(2,6,5,8)(9,13,14,12)(10,15,11,16)(17,18,21,22)(19,23,27,26)(20,24,30,28)(25,31,32,29)(18,22)(19,26)(23,27)(24,28)(25,29)(31,32) involution — undirectedA 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.