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