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