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