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