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