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