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