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