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