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