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