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