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)(17,18)(19,25)(20,28)(21,22)(23,26)(24,29)(27,30)(31,32)(34,38)(35,41)(36,44)(46,48)(10,13)(14,16)(18,22)(19,26)(24,28)(27,32)(33,34,37,38)(35,42,41,39)(36,45,44,40)(43,46,47,48)(9,10,12,13)(11,14,15,16)(17,18)(19,25)(20,28)(21,22)(23,26)(24,29)(27,30)(31,32)(33,34)(35,39)(36,45)(37,38)(40,44)(41,42)(43,48)(46,47)(1,2)(3,5)(4,6)(7,8)(17,19)(18,23)(20,27)(21,26)(22,25)(24,30)(28,31)(29,32)(33,35,37,41)(34,39,38,42)(36,43,44,47)(40,46,45,48)(1,3,4,7)(2,5,6,8)(9,11,12,15)(10,14,13,16)(17,20,21,29)(18,24,22,28)(19,27,26,32)(23,30,25,31)(33,36)(34,40)(35,43)(37,44)(38,45)(39,46)(41,47)(42,48)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.