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)(11,13)(12,14)(15,16)(17,18)(19,26)(20,24)(21,22)(23,27)(25,29)(28,31)(30,32) involution — undirected(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(18,22)(23,30)(24,25)(26,31) involution — undirected(1,3,5,4)(2,7,6,8)(11,15)(13,16)(17,19,20,27,21,28,29,32)(18,23,25,26,22,30,24,31)(11,15)(13,16)(17,20,21,29)(18,24,22,25)(19,27,28,32)(23,31,30,26)(1,4,5,3)(2,8,6,7)(10,14)(13,16)(19,28)(23,30)(26,31)(27,32)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.