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