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)(27,33)(28,36)(30,38)(31,39)(34,40)(35,37)(2,5)(6,8)(10,16)(11,21)(18,19)(22,24)(25,26,29,32)(27,34,35,30)(28,31,36,39)(33,40,37,38)(1,3,4,7)(2,6,5,8)(9,11,13,21)(10,17,16,12)(14,24,15,22)(18,23,19,20)(25,27)(26,30)(28,37)(29,35)(31,40)(32,34)(33,36)(38,39)(9,12)(10,11)(13,17)(14,23)(15,20)(16,21)(18,22)(19,24)(28,36)(31,39)(33,37)(38,40) 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.