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