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