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