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