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