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