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