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