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