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