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