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)(12,16)(13,15)(19,26)(23,31)(27,32)(28,29)(2,4)(5,7,8,6)(9,11,13,12)(10,14,15,16)(17,18)(19,27)(20,24)(21,25)(22,30)(23,29)(26,32)(28,31)(9,12,13,11)(10,14,15,16)(17,19,22,29,21,26,20,28)(18,23,24,27,25,31,30,32)(2,4)(17,20,21,22)(18,24,25,30)(19,28,26,29)(23,27,31,32)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.