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