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