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