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