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