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