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