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)(19,27,30,40)(20,25,32,36)(22,34,28,26)(24,37,35,31)(29,41,43,48)(33,45,42,39)(38,47,46,44)(1,3,5,8)(2,6,4,7)(10,11)(12,13)(18,23)(20,32)(24,35)(26,34)(27,40)(29,43)(33,42)(44,47)(1,2,5,4)(3,6,8,7)(9,11,14,10)(12,15,13,16)(17,19,28,37,21,30,22,31)(18,24,34,40,23,35,26,27)(20,29,42,47,32,43,33,44)(25,38,45,48,36,46,39,41)(1,4,5,2)(3,6,8,7)(9,12,14,13)(10,15,11,16)(17,20)(18,25)(19,29)(21,32)(22,33)(23,36)(24,38)(26,39)(27,41)(28,42)(30,43)(31,44)(34,45)(35,46)(37,47)(40,48)(9,13,14,12)(10,15,11,16)(20,32)(25,36)(29,43)(33,42)(38,46)(39,45)(41,48)(44,47)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.