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