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