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