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