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