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