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