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