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