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