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