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