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