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