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