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