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