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