One vertex per element, one color per generator, with an edge from x to x·s.
(10,16)(12,17)(18,23)(20,24)(25,26,30,31)(27,28,33,32)(29,34,38,39)(35,36,40,37)(1,2)(3,6)(4,7)(5,8)(9,10)(11,12)(13,17)(14,18)(15,16)(19,20)(21,24)(22,23)(26,31)(27,33)(34,39)(35,40) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11,15,13)(10,12,16,17)(14,19,22,21)(18,20,23,24)(25,26)(27,32)(28,33)(29,34)(30,31)(35,37)(36,40)(38,39)(9,12,15,17)(10,11,16,13)(14,20,22,24)(18,19,23,21)(25,27,30,33)(26,32,31,28)(29,35,38,40)(34,37,39,36)(1,3)(2,6)(4,8)(5,7)(9,13,15,11)(10,17,16,12)(14,19,22,21)(18,20,23,24)(25,28,30,32)(26,33,31,27)(29,37,38,36)(34,35,39,40)(1,2)(3,5)(4,7)(6,8)(9,14,15,22)(10,18,16,23)(11,19,13,21)(12,20,17,24)(25,29,30,38)(26,34,31,39)(27,35,33,40)(28,36,32,37)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.