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