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