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