One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(9,10)(11,13)(12,14)(15,16)(17,18,23,20,22,26,21,25)(19,27,30,29,28,24,31,32)(1,3,4,7)(2,5,6,8)(9,10)(11,15)(12,14)(13,16)(18,20)(19,28)(21,23)(24,29)(25,26)(27,32)(2,6)(5,8)(9,11)(10,13)(12,16)(14,15)(17,19)(18,24)(20,32)(21,31)(22,28)(23,30)(25,29)(26,27) involution — undirected(11,16)(13,15)(17,20,21,18,22,25,23,26)(19,29,31,27,28,32,30,24)(10,14)(13,15)(17,21,22,23)(18,20,26,25)(19,30,28,31)(24,29,27,32)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.