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