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