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