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