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