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