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