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)(11,15)(12,13)(14,16)(17,18)(19,25)(20,24)(21,30)(22,27)(23,26)(28,31)(29,32)(1,2)(3,4)(10,13)(14,15)(17,19,21,29,22,20,23,28)(18,24,30,31,27,25,26,32)(2,4)(6,8)(17,20,22,19)(18,25,27,24)(21,29,23,28)(26,32,30,31)(9,11,12,16)(10,14,13,15)(17,21,22,23)(18,26,27,30)(19,28,20,29)(24,31,25,32)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.