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