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