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