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