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