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