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)(11,15)(12,13)(14,16)(17,18,22,27)(19,30,32,25)(20,34,36,44)(21,39,33,41)(23,29,24,28)(26,38,43,37)(31,46,47,42)(35,45,48,40)(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19,22,32)(18,25,27,30)(20,35,36,48)(21,23,33,24)(26,42,43,46)(28,41,29,39)(31,38,47,37)(34,40,44,45)(1,3,5,4)(2,7,8,6)(10,13)(14,15)(17,20,24,38,22,36,23,37)(18,26,29,44,27,43,28,34)(19,31,33,48,32,47,21,35)(25,40,41,46,30,45,39,42)(1,3,5,4)(2,7,8,6)(9,11,12,16)(10,14,13,15)(17,21,24,19,22,33,23,32)(18,25,29,41,27,30,28,39)(20,35,38,31,36,48,37,47)(26,40,44,46,43,45,34,42)(1,4,5,3)(2,7,8,6)(18,27)(20,36)(25,30)(28,29)(31,47)(35,48)(37,38)(39,41)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.