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