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