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