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