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