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