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