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)(1,3)(2,8)(4,7)(5,15)(6,13)(9,11)(10,14)(12,16)(17,18,22,25)(19,26,29,32)(20,24,21,30)(23,27,31,28)(1,3,7,4)(2,9,11,8)(5,13,6,15)(10,14,16,12)(17,19,22,29)(18,23,25,31)(20,28,21,27)(24,32,30,26)(1,4,7,3)(2,9,11,8)(5,13,6,15)(10,12,16,14)(17,20,22,21)(18,24,25,30)(19,27,29,28)(23,26,31,32)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.