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