One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,7)(5,8)(6,11)(10,15)(12,14)(13,16)(17,18)(19,24)(20,25)(21,38)(22,41)(23,29)(26,34)(27,35)(28,39)(30,42)(31,58)(32,61)(33,46)(36,53)(37,49)(40,67)(43,54)(44,55)(45,59)(47,63)(48,62)(50,66)(51,64)(52,65)(56,74)(57,70)(60,80)(68,76)(69,75)(71,79)(72,77)(73,78) involution — undirected(1,3,5,11)(2,6,8,9)(4,12,13,10)(7,15,16,14)(17,19,23,33)(18,24,29,46)(20,30,37,57)(21,31,40,60)(22,32,39,59)(25,42,49,70)(26,43,51,72)(27,44,52,73)(28,45,41,61)(34,54,64,77)(35,55,65,78)(36,56,62,75)(38,58,67,80)(47,68,50,71)(48,69,53,74)(63,76,66,79)(1,4,5,13)(2,7,8,16)(3,10,11,12)(6,14,9,15)(18,25)(20,34)(21,35)(22,39)(24,42)(26,27)(28,53)(29,49)(30,54)(31,55)(32,59)(36,66)(37,64)(38,47)(40,65)(41,48)(43,44)(45,74)(46,70)(50,67)(51,52)(56,79)(57,77)(58,68)(60,78)(61,69)(62,63)(71,80)(72,73)(75,76)(2,8)(6,9)(7,16)(14,15) 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.