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