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)(11,18)(12,15)(13,17)(14,19)(16,20)(21,22)(23,24) involution — undirected(2,5)(6,7)(11,19)(12,20)(14,18)(15,16)(21,24)(22,23) involution — undirected(9,11,20,24,13,21,12,19)(10,14,15,22,17,23,16,18)(10,15,17,16)(14,22,23,18)(1,3,4,8)(2,6,5,7)(11,21)(14,23)(18,22)(19,24)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.