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