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