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