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