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)(19,20)(21,24)(22,25)(23,27)(26,28)(29,30)(31,32)(33,34,38,41)(35,42,45,39)(36,37,40,46)(43,48,47,44)(2,5)(8,10)(9,13)(15,16)(19,23)(20,27)(26,31)(28,32)(33,34,38,41)(35,39,45,42)(36,37,40,46)(43,44,47,48)(1,3,7,4)(2,8,5,10)(6,11,14,12)(9,15,13,16)(17,19,22,23)(18,20,25,27)(21,26,30,31)(24,28,29,32)(33,35)(34,39)(36,43)(37,44)(38,45)(40,47)(41,42)(46,48)(1,4,7,3)(2,8,5,10)(6,11,14,12)(9,16,13,15)(17,18)(19,20)(21,29)(22,25)(23,27)(24,30)(26,32)(28,31)(33,36)(34,37)(35,43)(38,40)(39,44)(41,46)(42,48)(45,47)(1,5,7,2)(3,10,4,8)(6,13,14,9)(11,16,12,15)(17,20)(18,23)(19,25)(21,28)(22,27)(24,31)(26,29)(30,32)(33,37)(34,40)(35,44)(36,41)(38,46)(39,47)(42,43)(45,48)(1,6,7,14)(2,9,5,13)(3,11,4,12)(8,15,10,16)(17,21)(18,24)(19,26)(20,28)(22,30)(23,31)(25,29)(27,32)(33,35)(34,39)(36,43)(37,44)(38,45)(40,47)(41,42)(46,48)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.