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