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