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