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