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