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