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