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