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