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