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