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