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