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