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)(11,21)(12,17)(13,18)(14,20)(15,19)(16,22)(23,24) involution — undirected(9,11,13,22,14,12,15,23)(10,16,19,21,20,24,18,17)(2,5)(6,8)(9,10,14,20)(11,21,12,17)(13,19,15,18)(16,22,24,23)(9,12)(10,17)(11,14)(13,23)(15,22)(16,19)(18,24)(20,21) involution — undirected(1,3,4,7)(2,6,5,8)(9,13,14,15)(10,18,20,19)(11,22,12,23)(16,17,24,21)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.