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