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