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