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