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