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