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