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