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