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