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