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