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