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