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