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