One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,7)(6,8)(9,10,15,21,16,22,14,20)(11,23,27,17,28,42,26,43)(12,29,32,47,33,46,39,18)(13,34,37,49,38,19,36,50)(24,52,30,44,54,40,58,51)(25,55,56,68,57,48,35,41)(31,61,63,45,64,59,66,65)(53,67,60,70,62,71,72,69)(1,3)(2,4)(5,8)(6,7)(9,11,16,28)(10,17,22,43)(12,30,33,58)(13,35,38,56)(14,27,15,26)(18,44,47,51)(19,48,34,55)(20,42,21,23)(24,39,54,32)(25,37,57,36)(29,52,46,40)(31,62,64,53)(41,50,68,49)(45,67,65,71)(59,69,61,70)(60,66,72,63)(1,4,6,5)(2,7,8,3)(9,12,15,39,16,33,14,32)(10,18,20,29,22,47,21,46)(11,24,27,58,28,54,26,30)(13,31,37,66,38,64,36,63)(17,40,23,51,43,52,42,44)(19,45,49,59,34,65,50,61)(25,53,56,72,57,62,35,60)(41,67,48,70,68,71,55,69)(1,5,6,4)(2,7,8,3)(9,13,15,37,16,38,14,36)(10,19,21,50,22,34,20,49)(11,25,27,56,28,57,26,35)(12,31,39,66,33,64,32,63)(17,41,42,55,43,68,23,48)(18,45,46,61,47,65,29,59)(24,53,58,72,54,62,30,60)(40,67,44,69,52,71,51,70)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.