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