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