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