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