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