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