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