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