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