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