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