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)(11,12,16,15)(17,18,22,21)(19,23,24,20)(26,29)(30,32)(3,7)(6,8)(9,11)(10,12)(13,16)(14,15)(17,19,22,24)(18,20,21,23)(27,31)(30,32)(2,5)(6,8)(10,14)(11,16)(18,21)(19,24)(25,26,28,29)(27,30,31,32)(1,2)(3,6)(4,5)(7,8)(9,11)(10,15)(12,14)(13,16)(17,20)(18,19)(21,24)(22,23)(25,26)(27,30)(28,29)(31,32) involution — undirected(1,3,4,7)(2,6,5,8)(9,12,13,15)(10,11,14,16)(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.