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