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