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