One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(9,12)(10,14)(11,13)(15,16)(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)(2,6)(4,11)(5,10)(7,13)(8,14)(9,15)(12,16)(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)(2,7)(4,12)(6,13)(8,9)(11,16)(14,15)(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)(2,8)(6,14)(7,9)(13,15)(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)(3,10)(6,14)(11,16)(13,15)(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.