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