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