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