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