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