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