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