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