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