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