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