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