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