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