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