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