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