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