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