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