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