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