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