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