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