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