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