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