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