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