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