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