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