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