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