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