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