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