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)(11,13,15,16)(17,18)(19,22)(20,28)(21,25)(23,26)(24,30)(27,31)(29,32)(1,3,5,4)(2,6,7,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,22)(20,28)(21,26)(23,25)(24,29)(27,31)(30,32)(11,15)(13,16)(17,20,22,30,23,31,21,29)(18,24,25,28,26,32,19,27)(1,4,5,3)(2,6,7,8)(11,15)(13,16)(17,18)(19,21)(20,24)(22,25)(23,26)(27,29)(28,30)(31,32)(17,21,23,22)(18,25,26,19)(20,29,31,30)(24,28,32,27)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.