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