One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(10,14)(11,15)(17,18,21,22)(19,20,24,23)(25,26,29,27)(28,30,32,31)(1,2,5,4)(3,6,8,7)(9,10)(11,12)(13,14)(15,16)(17,18)(19,23)(20,24)(21,22)(25,27,29,26)(28,30,32,31)(10,14)(11,15)(18,22)(19,24)(25,28)(26,30)(27,31)(29,32) involution — undirected(1,3,5,8)(2,6,4,7)(9,11,13,15)(10,12,14,16)(17,19)(18,20)(21,24)(22,23)(1,4,5,2)(3,7,8,6)(9,12)(10,15)(11,14)(13,16)(17,20)(18,19)(21,23)(22,24)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.