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