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