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