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