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