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