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