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