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