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