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