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