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