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