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