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