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)(13,21)(14,17)(15,19)(20,23)(22,24) involution — undirected(5,6)(7,8)(9,11,14,20)(10,15,17,24)(12,19,13,22)(16,23,21,18)(2,4)(6,8)(9,10)(11,15)(12,21)(13,16)(14,17)(18,19)(20,24)(22,23) involution — undirected(5,6)(7,8)(9,12,14,13)(10,16,17,21)(11,19,20,22)(15,23,24,18)(6,8)(9,12,14,13)(10,16,17,21)(11,19,20,22)(15,23,24,18)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.