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