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