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