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