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