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