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