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