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)(17,18,22,24)(19,21,26,23)(20,28,29,25)(27,31,32,30)(9,11,13,16)(10,14,12,15)(17,19,22,26)(18,23,24,21)(20,27,29,32)(25,31,28,30)(2,6)(3,7)(18,24)(19,26)(20,29)(30,31) involution — undirected(1,3,5,7)(2,4,6,8)(9,10,13,12)(11,14,16,15)(17,19)(18,21)(20,27)(22,26)(23,24)(25,30)(28,31)(29,32)(1,4)(2,7)(3,6)(5,8)(9,12,13,10)(11,15,16,14)(17,20,22,29)(18,25,24,28)(19,27,26,32)(21,30,23,31)(17,21)(18,19)(20,30)(22,23)(24,26)(25,27)(28,32)(29,31) 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.