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