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