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