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