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