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