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