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