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