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)(11,15)(12,14)(13,16)(18,23)(19,21)(20,24) involution — undirected(2,5)(3,8)(9,11)(10,13)(12,16)(14,15)(17,18,21,23,22,20,19,24)(1,3,4,8)(2,6,5,7)(10,14)(11,16)(17,19,22,21)(18,23,20,24)(2,5)(6,7)(10,14)(11,16)(17,19,22,21)(18,24,20,23)(2,5)(6,7)(10,14)(13,15)(17,20,21,24,22,18,19,23)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.