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