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