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