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