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