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