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