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