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