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