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