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