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