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