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