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