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