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