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