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