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