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