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