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