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)(17,18,24,27,23,29,22,28)(19,26,21,32,31,20,30,25)(2,8,12,11)(3,14,10,15)(4,16)(9,13)(17,19,24,21,23,31,22,30)(18,25,28,20,29,32,27,26)(1,3)(2,9)(4,8)(5,14)(6,10)(7,15)(11,16)(12,13)(17,20,23,26)(18,19,29,31)(21,27,30,28)(22,25,24,32)(1,4,5,9,6,16,7,13)(2,10,11,15,12,3,8,14)(17,21,24,31,23,30,22,19)(18,26,28,25,29,20,27,32)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.