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