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