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