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