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