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