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