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