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