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