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