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