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