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