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