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