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