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