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