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