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