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