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