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