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