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