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