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