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