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