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