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