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