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