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