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