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