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