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