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