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