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