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