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