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)(11,13)(12,15)(14,16)(17,18,20,22)(19,23,24,21)(25,26,29,32)(27,30,31,28)(2,6)(4,8)(9,10,13,11)(12,15,16,14)(19,24)(21,23)(25,27,29,31)(26,30,32,28)(2,6)(3,7)(10,11)(14,15)(17,19)(18,21)(20,24)(22,23)(25,28,29,30)(26,31,32,27)(1,3,5,7)(2,4,6,8)(9,11,13,10)(12,15,16,14)(1,4)(2,7)(3,6)(5,8)(9,12)(10,14)(11,15)(13,16)(17,18)(19,21)(20,22)(23,24)(25,26)(27,30)(28,31)(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.