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