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