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