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