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