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