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