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