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