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