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