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