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