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)(11,16)(12,14)(13,15)(17,18,22,24)(19,20,21,23)(25,26,29,30)(27,28,32,31)(1,3)(2,6)(4,7)(5,8)(9,11,13,12)(10,14,15,16)(17,19,22,21)(18,23,24,20)(26,30)(27,32)(2,4)(6,7)(11,12)(14,16)(18,24)(19,21)(25,27,29,32)(26,31,30,28)(1,3)(2,6)(4,7)(5,8)(9,10)(11,16)(12,14)(13,15)(17,20)(18,19)(21,24)(22,23) involution — undirected(1,4,5,2)(3,7,8,6)(9,12,13,11)(10,14,15,16)(17,21,22,19)(18,20,24,23)(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.