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