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