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