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