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