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