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