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