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