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