One vertex per element, one color per generator, with an edge from x to x·s.
(5,6)(7,11)(8,10)(9,12)(13,14,17,22,34,45,60,58,19,24,36,47,18,23,35,46)(15,20,27,40,54,67,74,71,26,39,53,66,28,41,56,69)(16,29,30,48,37,63,62,43,32,59,61,42,31,44,33,21)(25,49,51,70,57,76,75,64,50,72,73,65,52,68,55,38)(1,2,3,4)(5,7,8,12)(6,9,10,11)(13,15)(14,20)(16,25)(17,27)(18,28)(19,26)(21,38)(22,40)(23,41)(24,39)(29,49)(30,51)(31,52)(32,50)(33,55)(34,54)(35,56)(36,53)(37,57)(42,65)(43,64)(44,68)(45,67)(46,69)(47,66)(48,70)(58,71)(59,72)(60,74)(61,73)(62,75)(63,76)(2,4)(13,16,19,32)(14,21,24,43)(15,25,26,50)(17,33,36,62)(18,37,34,31)(20,38,39,64)(22,44,47,63)(23,48,45,42)(27,55,53,75)(28,57,54,52)(29,58,59,46)(30,60,61,35)(40,68,66,76)(41,70,67,65)(49,71,72,69)(51,74,73,56)(6,10)(9,11)(15,26)(20,39)(25,50)(27,53)(28,54)(38,64)(40,66)(41,67)(49,72)(51,73)(52,57)(55,75)(56,74)(65,70)(68,76)(69,71) 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.