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