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