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