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