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)(19,21)(20,28)(22,25)(23,27)(24,29)(26,30)(31,32)(3,8)(5,6)(9,10)(11,12)(13,15)(14,16)(17,19)(18,23)(20,26)(21,25)(22,27)(24,30)(28,31)(29,32) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11,13,16)(10,14,15,12)(20,29)(24,28)(26,32)(30,31)(3,8)(5,6)(11,16)(12,14)(17,20,22,29)(18,24,25,28)(19,26,27,32)(21,31,23,30)(1,3)(2,6)(4,8)(5,7)(9,12)(10,11)(13,14)(15,16)(17,21,22,23)(18,19,25,27)(20,30,29,31)(24,32,28,26)(1,2)(3,5)(4,7)(6,8)(9,10)(11,14)(12,16)(13,15)(17,19)(18,21)(20,26)(22,27)(23,25)(24,31)(28,30)(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.