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