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