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