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