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