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