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