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