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