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