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