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