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