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