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