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