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