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