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