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