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