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)(20,21)(24,31)(25,29)(26,27)(30,32) involution — undirected(1,3)(2,7)(4,11)(5,13)(6,12)(8,14)(9,15)(10,16)(17,18)(19,24)(20,23)(21,29)(22,25)(26,31)(27,30)(28,32) involution — undirected(1,3)(2,8)(4,13)(5,11)(6,12)(7,14)(9,16)(10,15)(17,19)(18,24)(20,27)(21,26)(22,28)(23,30)(25,32)(29,31) involution — undirected(1,4,6,5)(2,9,10,14)(3,11,12,13)(7,15,16,8)(17,20,22,21)(18,23,25,29)(19,26,28,27)(24,31,32,30)(2,10)(7,16)(8,15)(9,14)(17,20,22,21)(18,23,25,29)(19,27,28,26)(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.