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