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