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