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