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