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