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