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