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