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