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