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