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