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