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