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