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