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