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