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