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