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