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