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