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