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