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