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