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