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