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