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