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