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