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