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