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