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