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