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