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