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)(11,15)(12,14)(13,16)(18,23)(24,30)(25,31)(27,32) involution — undirected(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,18,21,23)(19,24,22,30)(20,27,29,32)(25,28,31,26)(1,3,4,7)(2,6,5,8)(10,14)(11,16)(17,19,21,22)(18,24,23,30)(20,28,29,26)(25,27,31,32)(10,14)(13,15)(17,20,21,29)(18,25,23,31)(19,26,22,28)(24,32,30,27)(2,5)(6,8)(10,14)(13,15)(20,29)(25,31)(26,28)(27,32) 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.