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