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