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