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