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