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