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