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