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