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