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