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