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