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