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