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