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