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