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)(11,13)(12,14)(15,16)(17,18,23,20,22,24,21,26)(19,25,29,28,27,31,30,32)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(18,24)(19,27)(20,26)(29,30)(10,14)(13,16)(17,19)(18,25)(20,28)(21,30)(22,27)(23,29)(24,31)(26,32) involution — undirected(17,20,23,24,22,26,21,18)(19,28,29,31,27,32,30,25)(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,26,24,20)(19,29,27,30)(25,28,31,32)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.