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