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