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