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