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