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