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