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