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