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