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