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