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