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