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