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