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