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