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