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