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