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