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)(2,6)(7,8)(17,18,21,25)(19,23,28,31)(20,22,29,24)(26,30,27,32)(1,3,5,4)(2,7,6,8)(9,11,12,16)(10,13,14,15)(18,22)(19,26)(20,29)(24,25)(27,28)(30,32)(1,3,5,4)(2,7,6,8)(17,19)(18,23)(20,26)(21,28)(22,30)(24,32)(25,31)(27,29)(1,4,5,3)(2,8,6,7)(18,22)(19,26)(20,29)(24,25)(27,28)(30,32)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.