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