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