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