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