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