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