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