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