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