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