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