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)(19,29,32,39,33,43,31,24)(20,34,35,42,36,41,37,25)(30,40,45,44,47,38,46,48)(1,3)(2,7)(4,14)(5,11)(6,12)(8,9)(10,16)(13,15)(17,19,21,31,23,33,22,32)(18,24,26,29,28,39,27,43)(20,30,35,45,36,47,37,46)(25,40,41,48,42,38,34,44)(1,3)(2,8)(4,14)(5,11)(6,12)(7,13)(9,16)(10,15)(17,20,21,35,23,36,22,37)(18,25,26,41,28,42,27,34)(19,30,31,45,33,47,32,46)(24,38,29,44,39,40,43,48)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.