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