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