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