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