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