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