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