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