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