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