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