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