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