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