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