One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,11)(8,12)(9,10)(13,19)(14,17)(15,20)(16,18)(21,22)(23,28)(24,37,41,48)(25,31)(26,32)(27,30)(29,39,47,40)(33,49,50,46)(34,45)(35,43)(36,44)(38,42,51,52)(6,10)(11,17)(12,18)(19,20)(21,23,26,36,27,34,25,35)(22,28,32,44,30,45,31,43)(24,38,40,50,41,51,39,33)(29,46,48,52,47,49,37,42)(2,4)(5,7,9,14)(6,11,10,17)(8,15,16,13)(12,20,18,19)(21,24)(22,29)(23,33)(25,40)(26,39)(27,41)(28,42)(30,47)(31,48)(32,37)(34,50)(35,38)(36,51)(43,46)(44,49)(45,52)(5,8,9,16)(6,12,10,18)(7,13,14,15)(11,19,17,20)(22,30)(23,34)(29,47)(31,32)(33,50)(35,36)(37,48)(38,51)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.