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)(19,20)(21,25)(22,23)(24,27)(26,28)(29,32)(30,31)(1,2,4,3)(9,11)(10,14)(12,15)(13,16)(18,23)(20,27)(25,31)(28,32)(2,3)(10,15)(12,14)(17,19,22,24)(18,20,23,27)(21,29,30,26)(25,32,31,28)(5,6,7,8)(9,11)(10,14)(12,15)(13,16)(17,20)(18,24)(19,23)(21,28)(22,27)(25,29)(26,31)(30,32)(1,3,4,2)(9,12,13,14)(10,11,15,16)(17,21)(18,25)(19,26)(20,28)(22,30)(23,31)(24,29)(27,32)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.