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