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