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