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