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