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