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