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