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