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