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