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