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