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