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