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