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