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