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