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