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