One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,8,9)(7,10,11,12)(13,14)(15,19)(16,18)(17,20)(22,27)(23,28)(25,33)(31,36)(7,11)(10,12)(13,14)(15,19)(16,18)(17,20)(21,22,26,27)(23,24,28,32)(25,29,33,35)(30,31,34,36)(6,9)(10,12)(13,14,16,18)(15,17,20,19)(21,23)(22,24)(25,34)(26,28)(27,32)(29,36)(30,33)(31,35)(1,2)(3,4)(5,6)(7,10)(8,9)(11,12)(13,14)(15,17)(16,18)(19,20)(21,24)(22,28)(23,27)(25,31)(26,32)(29,34)(30,35)(33,36) involution — undirected(5,7)(6,10)(8,11)(9,12)(13,15,16,20)(14,17,18,19)(21,25)(22,29)(23,30)(24,31)(26,33)(27,35)(28,34)(32,36)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.