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