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