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