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