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