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