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