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