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