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