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