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