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