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