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