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