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