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