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