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