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