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