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