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