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