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