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