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