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