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